Fluids flow down a hydraulic gradient, from points of higher to lower hydraulic head.

流体向水力梯度下游的流动是从水力压头较高处到水力压头较低处。

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While fluids flow through a pipe, dynamics loses because of the surface friction of pipe.

流体流经管道时，由于管道表面的摩擦力而产生力头损失。

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If reservoir fluids flow into another formation and do not flow to the surface, the result is called an underground blowout.

如果油藏流体流入另一层地层，而不是喷至地面，这种结果称之为地下井喷。

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One purpose of fracking fluids is to help the sand flow into newly formed fissures and keep them propped open.

NPR: Judge Sides With Wyoming In Fracking Chemical Suit

Jake was a consequence of those residual fluids, eventually solidifying just inside a Martian volcano or in a lava flow.

BBC: Cosmic coincidence on the road to Glenelg